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SATA_LINK_SCR_LPM(9) | libata Library | SATA_LINK_SCR_LPM(9) |
NAME¶
sata_link_scr_lpm - manipulate SControl IPM and SPM fieldsSYNOPSIS¶
int
sata_link_scr_lpm(struct ata_link * link,
enum ata_lpm_policy policy,
bool spm_wakeup);
ARGUMENTS¶
linkATA link to manipulate SControl for
policy
LPM policy to configure
spm_wakeup
initiate LPM transition to active state
DESCRIPTION¶
Manipulate the IPM field of the SControl register of link according to policy. If policy is ATA_LPM_MAX_POWER and spm_wakeup is true, the SPM field is manipulated to wake up the link. This function also clears PHYRDY_CHG before returning. LOCKING: EH context.RETURN¶
0 on success, -errno otherwise.AUTHOR¶
Jeff GarzikAuthor.
COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |